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A108896
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Numbers such that the outer 2 digits are 9 and the inner digits are 4.
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0
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949, 9449, 94449, 944449, 9444449, 94444449, 944444449, 9444444449, 94444444449, 944444444449, 9444444444449, 94444444444449, 944444444444449, 9444444444444449, 94444444444444449, 944444444444444449
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| These numbers are all composite.
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LINKS
| Cino Hilliard, Proof 94..49
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FORMULA
| S(x)=9*10^(x+1)+ 9 + 40*(10^x-1)/9.
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PROG
| (PARI) S(n, r, m)=for(x=1, n, y=m*10^(x+1)+m+r*10*(10^x-1)/9; print1(y", "))
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CROSSREFS
| Sequence in context: A187627 A020366 A013532 * A096954 A048267 A073500
Adjacent sequences: A108893 A108894 A108895 * A108897 A108898 A108899
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KEYWORD
| easy,nonn,base
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AUTHOR
| Cino Hilliard (hillcino368(AT)gmail.com), Jul 16 2005
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